05000366/LER-1981-048-03, /03L-0:on 810527,while Operating at 99% Power Control Rod Scram Accumulator 26-47 Found Inoperative.Caused by Leakage in Instrument Block Valve III of Accumulator. Accumulator Recharged Per HNP-2-1425 Procedure

/03L-0:on 810527,while Operating at 99% Power Control Rod Scram Accumulator 26-47 Found Inoperative.Caused by Leakage in Instrument Block Valve III of Accumulator. Accumulator Recharged Per HNP-2-1425 Procedure

ML20004D600
Person / Time
Site:	Hatch
Issue date:	06/02/1981
From:	Coggin C GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20004D585	List: 05000366/LER-1981-048, Forwards LER 81-048/03L-0 05000366/LER-1981-048-03, /03L-0:on 810527,while Operating at 99% Power Control Rod Scram Accumulator 26-47 Found Inoperative.Caused by Leakage in Instrument Block Valve III of Accumulator. Accumulator Recharged Per HNP-2-1425 Procedure
References
LER-81-048-03L, LER-81-48-3L, NUDOCS 8106090567
Download: ML20004D600 (2)

LER-1981-048, /03L-0:on 810527,while Operating at 99% Power Control Rod Scram Accumulator 26-47 Found Inoperative.Caused by Leakage in Instrument Block Valve III of Accumulator. Accumulator Recharged Per HNP-2-1425 Procedure

Event date:
Report date:
3661981048R03 - NRC Website

text

- - -

NRC FcRM 366 U. S. NUCLEAR REGULATORY COMMISSION 17 771 I

LICENSEE EVENT REPORT O-CONTROL Blocc l l

l l

l l lh (PLEASE PRINT OR TY'E ALL REQUlat0 INFORMATION) o M l Gl A lE II lH I ?l@l0 l0 I -l 0 l O l 0 l 0 l 0 l - l 0 l 0 !@l 4 l 1 l 1 l 1 l l IGL I I@

7 8 9 LICENSEE CODE 14 IS LICENSE NUMdEH 23 2G LICENhE T VPE JQ

$ 7 4 A T bd CON'T l.2MJ

$MiU Lij@l0 l Sl 010101316l 61@l o f SI 2.] 71 g l ! j@l 01610 l 21811 l@

7 8

60 68 DOCKET NUMDER 6d 63 EVENT QATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSECUENCES h lo 121 IWhile ooerating at 2422 MWt, 2C11 control rod scram accumulator 26-47 I

lo lai Iwas found to be inoperative.

Tech Specs section 4.1.3.5.a requires thatl 1o 141 Ithe accumulator be returned to ooerable status within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.

The pland lo151 Nas placed in an 8-hour LCO.

The health and sa fety of the public were j

oIslinot affected.

This is a repetitive event as last report on LER 50-366/

I lo17111981-040.

I 10181l I

7 89 80 E

CODE

$ SC E COMPONENT COCE SL8 Code lol91 lR lB l@ IX l@ l Zl@ l A lC l C IU lM lu l@ lZ l@ l Zl@

7 8

9 10 13 12 13 18 19 20 SEQUE NTI AL OCCURRENCE REPORT REk lSION LER/RO

,, EVENT YEAR REPORT NO.

CODE TYPE NO.

@ Nug 1811 !

l-l 1014181 1/l 10 13 I LtJ I-I 10 1 at

,21 22 23 24 26 27 28 29 30 31 32 K N AC O O P NT ME HOURS S8 iT FOR.1 L8.

SL oli MANU ACTURER l El@l El@

l Z l@

l Z l@

l0l010l0l lYl@

l N l@

l N l@

lGl0l810l@

34 34 36 36 37 40 41 42

'43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h li t o l IThe cause o f this event has been attributed to leakage in the 111 instru-l ii tiliment block valve of the accumulator.

The accumulator was recharced oer I ii i2i IHNP-2-1425, Precharging CRD Scram Accumulators Procedure.

The accumula-I D t 31 Itor was decla red operable and returned to servir.g l

l i 14 l 'l I

7 8 9 80 i

SA

% PCWER OTHER STATUS is O RY olSCOVERY OESCRIPTION

' I IsIlEl@ l0I9l9l@l NA l

lA[@l Accumulator Alarm l

'dTiviry CSTENT l1 lc I lZ l @ l Zl@l AMOUNT OF ACTIVffY @ l LOCATION CF RELEASE @

aELEASED JF RELE ASE NA l

NA l

Pen 10NNEL ExPOSOES oESCmPriCN @

NumER rvPE l [7Tl [ 0 l 0 l 0 l@l Z [@l NA l

PERSONNE L INJU Es NuveER C ESCniP TIOP' n m 101010 lel NA l

i7 8 9 11 2

' " ^

80

'?d'E ESCTi, WON '' " @

IiI9i LZ_J6L NA

,1 7-6 9 10 go ISSUE

DESCRIPTION

112 lu I n f81 NA l

((lllllllti l}

.7 a 3 io c8 63 so ;;

NAP E I OG3.} n SUDt. pit. EDO.

n oa ooo 9CPARER SPPV.

PHONE-9I2-307-786I E

LER i:

50-366/1981-048 Licensee:

Georgia Power Company Facility Name:

Edwin I.

Hatch Docket #:

50-366

Narrative

Report for LER 50-366/1981-048 On 5-27-81, while operating at 99% power 2Cll, control tod scram sccumulator 26-47, was found to be inoperative.

Per Tech Specs section 4.1.3.5.a the inoperable accumulator must be returned to operable status within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.

The plant was placed in an LCO until the accumulatcr could be recharged.

The cause of this event has been attributed to leakage in the 111 instrument block valve of the accumulator.

The accumulat-or was recharged per HNP-2-1425, Precharging CRD Scram Accum-ulators Procedure.

The accumulator was declared operable and returned to service.

Plant operation was not affected as a result o,f this event.

The health and safety of the public were not affected.

This is a repetitive event as last reported on LER 50-366/1981-040.

A generic review revealed no inherent problems.

Unit 1 does utilize this type of accumulator.

I 1

i